Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Enjoy the builds and please also visit us on Facebook and Twitter

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Saturday, 11 February 2012

Marshall Supa Fuzz

Made for Marshall by Sola Sound this is essentially a slightly modified Tone Bender MkII. Fuzz Central state:

The only differences between the two: the input capacitor is 10µF instead of 5µF, the bypass capacitor on the "attack" pot is 10µF instead of 5µF, Q2's collector resistor is 47K instead of 100K, the resistor from the base of Q1 to ground is 10K instead of 100K, and the transistors are OC75 instead of OC81D. The sound of the pedals should be nearly the same, although the Supa Fuzz will probably be bassier since the input capacitor is quite a bit larger, especially with that 0.01µF from input to ground still in place, which removes even more treble.

Suggested mods

Fuzz Central suggest the following mods and the trimmer would seem like a good idea to me to accurately bias Q3:

470R changed to a 1K for more volume
8.2K changed to a 25K pot for external bias

It's surprising that there's been so little action on this one. This is a quick and easy build that is well worth the price of admission. I used the 1k resistor in place of the 470r and it is abundantly loud. This fuzz has sustain for days and tremendous harmonic overtones. There's a very strong midrange boost too, like a Cry Baby in a near forward position. Mick Ronson would have loved this one. Cheers, Mark!

If you find 1k means too much hiss or motor boating 810r or lower will help ,it best to socket this resister to get the right amount of volume to noise ratio to suit ,I went with 810 r , this pedal is great for Clapton s woman tone and rhythm ,

I built this last night and kinda rejigged it so that I didn't need to twist the base and collector around on Q3.

At first I was trying to figure out how to flip the collector and base back around, then I realized it would be much easier to instead move the emitter over to the top side of the base.

Just move the emitter up top, replace the 100k feedback resistor with a link, then move the 100k over to the left side of the board where there's space between the caps. After that you just need a cut seperating the Q3 emitter and link from the Q2 base

I dunno if twisting the legs really bothers anyone else much. It makes it a bit of a pain to socket transistors for me though so hope my explanation helps

There's no sound coming out, but the LED does come on (switch works). Here are the values I got. I ordered the set (3x matched OC75) from Small Bear and it came with two resistors. The 47k was replaced with 15k and the 8K2 was replaced with 7K5. I doubt that has to do with why it's not working though.Power: 9.39V

Hey guys . I just bought this. Pedal and circuit looks like it's in great shape . My one issue is there is a lot of "white noise" when notes are not been played (more then normal).would love a tip to get rid of it or tame it down. Ps I also feel that the filter doesn't have a huge impact. Cheers

The Marshall 3005 Lead 12 was a mini-stack with a 12 watt solid state head made in England between 1988 and 1991. People claim it's a gr...

Note

Not all these layouts are verified and some are put together from unverified schematics. So if you have good luck, or bad luck for that matter, then please let me know by dropping a comment in the topic. Thanks.

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